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Re: tungsten carbide magnetic?



Original poster: "Harold Weiss" <hweiss@xxxxxxxxxx>

Hi Mike,

Thoriated tungsten will make a gap break down easier, which is not such a bad thing. I use them for Terry Filters and rotory electrodes. The thorium will tend to ensure gap firing which is a good thing when resonant sized capacitors are used. It will fire the gap before it rings up high enough to cause damage.

David E Weiss

Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>

I've heard thoriated rods are a bad choice for a gap, not just for radioactive reasons. The thorium is added to make the rods arc more consistently in a welder. If that's the case, won't these make for a TC gap that has poor quenching?

Mike
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, April 07, 2005 7:27 PM
Subject: Re: tungsten carbide magnetic?


Original poster: Lee Kohlman <lwkksw@xxxxxxxxx>

I am designing a static spark gap using 1/8" tungsten welding rods (yes, thoriated but to be used outside). I have access to phenolic fiberglass to support them. I have a total of 10 rods that I would like to lay parallel and still have some way to adjust gap length. Of course I would love to build a SRSG but that's too involved for now. Any suggestions?

Thanks,
Lee K.

Original poster: BunnyKiller


but do you need that extra diameter? I am using 1/8" dia pure welding tungsten no thorium ( and you know what power Im dealing with ;) ... and have very little wear and erosion problems.. plus the minimal diameter makes it easier on disc design and dwell time...


Scott D.